Professor Jung, one of the founders of analytical psychology, was born in Kesswil on July 26, 1875.

From the Late Middle Ages until 1798, Kesswil was under the courts of the Abbot of St. Gall.

[3] In the 19th century, most of the local economy was based mostly around agriculture, viticulture and fisheries, though some weaving, trade and small businesses were also located in the village.

With the transition to cattle and dairy farming, the number of fruit-growing orchards increased.

Many of the other local jobs were in farming (fruit, berries) and a nursery (Roth Pflanzen AG).

[3] Kesswil has an area, as of 2009[update], of 4.47 square kilometers (1.73 sq mi).

Of the rest of the land, 0.61 km2 (0.24 sq mi) or 13.6% is settled (buildings or roads).

[4] The municipality is located in the Arbon district, between Romanshorn and Kreuzlingen on Lake Constance.

Most of the population (as of 2000[update]) speaks German (93.5%), with Italian being second most common (1.9%) and Portuguese being third (1.4%).

[6] a The age distribution, as of 2009[update], in Kesswil is; 113 children or 11.5% of the population are between 0 and 9 years old and 104 teenagers or 10.6% are between 10 and 19.

In the federal election, a total of 405 votes were cast, and the voter turnout was 63.5%.

[13] The historical population is given in the following table:[3] The entire village of Kesswil is designated as part of the Inventory of Swiss Heritage Sites.

[7] From the 2000 census[update], 244 or 28.7% were Roman Catholic, while 430 or 50.6% belonged to the Swiss Reformed Church.

The lower and upper primary levels begin at about age 5-6 and lasts for 6 years.

At the lower primary level, there are 22 children or 59.5% of the total population who are female, 3 or 8.1% are not Swiss citizens and 2 or 5.4% do not speak German natively.

In the upper primary level, there are 16 or 55.2% who are female, 3 or 10.3% are not Swiss citizens and 2 or 6.9% do not speak German natively.

Finally, there are 111 teenagers who are in special or remedial classes, of which 51 or 45.9% are female, 11 or 9.9% are not Swiss citizens and 6 or 5.4% do not speak German natively.